NOW IN STOCK!!!

The Grannas Racing cast aluminum bellhousing for BMW B58 to T56 Magnum is designed with performance street cars in mind. Budget friendly, easy to install, high quality, heavy duty, precision machined, and better at noise cancelling than a steel bellhousing much like an OEM bellhousing would be. These come with all hardware required for install.

You can use these bellhousings to swap a B58 + T56 transmission into other chassis as well with a universal kit.

These bell housings also come standard in all my bolt-in GR700A kits (A for Aluminum bell) for the bmw 140i, 240i, 340i, and 440i.

These cast aluminum bellhousings are precision machined to within .002 of center. While we are proud of our tight tolerances, we do recommend double checking your block for index to ensure you are within .005 runout for high performance applications. We have found that manufacturers tolerances are not as consistent from one block to the next. Also if your block was line bored this can cause more runout.

Machined in the USA for precision, accuracy and the ability to easily make changes if need be. We check these on a few different stock engines and and machine the bells to try and land within a .005 tolerance range. Most customers should fall within index recommendations of .005 but i highly recommend checking it just for peace of mind.

INDEXING / CHECKING RUNOUT
I do recommend checking runout with an index plate. I think it is better to play it safe and just check these to be sure, and will also keep you within TREMEC's warranty terms and conditions. Also, a bell that is out of index can cause premature failure of the input bearing as well as uneven wear and heat in the input gear. A tell-tale sign of an out of index bell can be a lot of rollover noise coming from the transmission. This is due to a side-loading condition on the input which over time can cause transmission issues. 

These will work with GM based TR6060 transmissions as well the older LS T56 (not the LT) (if using a magnum front plate) but i HIGHLY recommend buying my complete kits as I can ENSURE proper fitment, and provide all the proper parts and all hardware!